Publications by authors named "Sakiya Yamasaki"
Objectives: Males, on average, are bigger and stronger than females. Hormonal differences during puberty are one reason given for this performance advantage. However, not all evidence supports that thesis.
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- Handgrip strength (HGS) is an important indicator of health in children and adults, and low HGS in childhood may persist into adulthood without intervention.
- The review explored whether physical exercise interventions can effectively improve HGS in children, revealing traditional exercise programs may not significantly enhance HGS beyond normal developmental changes.
- It suggests that targeted grip exercises could lead to greater improvements in HGS, highlighting the need for incorporating these exercises into physical activity programs for children to potentially enhance long-term health.
Objective: A Smedley hand dynamometer is one of the standard devices for measuring handgrip strength (HGS) for children and adults. The aim was to compare the HGS values using two different types of dynamometers (Grip-A or Grip-D) in young children. To enable comparison between the two devices, we have redesigned the Grip-D (i.
View Article and Find Full Text PDFAlterations in the expression of myosin heavy chain isoforms in hypoxia-induced hypertrophied ventricles in rats.
Comp Biochem Physiol B Biochem Mol Biol
September 2003
This study was designed to characterize cardiac changes in myosin heavy chain (MHC)-beta, capacity for oxidative metabolism and muscle mass in hearts of rats born and raised at simulated altitudes (2200 m or 4000 m) compared to age-matched sea level controls. On the basis of electrophoretic analyses, we found that the hypoxia-induced ventricular hypertrophy produces a significant increase in MHC-beta in both ventricles. Furthermore, we observed an exponential relationship between the mass of right ventricular muscle and percentages in the expression of MHC-beta (r=0.
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